Technique 1: The 90 degree Fold
Lay flex strip out and identify location where fold will be made.
Begin by folding flex back at a 45 degree angle in the direction opposite the corner you need to round.
Bend flex back on itself in the proper direction to create a 90 degree angle
Press firmly to crease, if desired use dab of super glue to secure the fold.
Technique 2: The 90 degree Pinch
For simple corner turn, pinch the flex between LED components into a peak. Use a dab of superglue to hold pinch inplace.
Technique 3: The Curve
To make a gradual turn, create a series of smaller accordion folds following the shape of the curve.